File extension is very important and useful for both Windows and users. By simply looking at the file extension, we can know what type of information is saved in and what program to apply to open this file. So does the Windows. According to .WDF file extension, the Operating System will know exactly what program the file you are trying to open is associated with. If Windows can't open .WDF file, it means it can not find the associated programs. There are many reasons that cause this problem:

The correct program is not installed.

The associated program to open the file is out-dated.

The registry entry of the file association is corrupted.

The file extension has not been associated with the correct program.

The file is corrupted by malware

How Can I Open .WDF File?

If your computer has no such program to open .WDF file, you need to find and install the appropriate program. And you should pay attention to the version of the program, otherwise, you will also fail to open .WDF file. If you have got the program but can not open the file, you should go to Windows registry and check whether the file association is built or broken, or has been damaged by computer spyware. Since this job is too complicated and time-consuming, it's recommended you employ an automatic file open tool specially designed to analyse all possible factors and open various files for you.